﻿320 
  

  

  ERNEST 
  E. 
  AUSTEN. 
  

  

  angle 
  about 
  middle 
  of 
  upper 
  margin, 
  which 
  is 
  moderately 
  excavated 
  in 
  front 
  of 
  the 
  

   angle. 
  Thorax 
  : 
  dorsum 
  clothed 
  with 
  fine, 
  erect, 
  silky, 
  pale 
  yellowish 
  hair, 
  

   scattered 
  among 
  which 
  is 
  a 
  certain 
  number 
  of 
  fine 
  black 
  or 
  blackish 
  hairs, 
  which 
  

   ■on 
  scutellum 
  are 
  much 
  more 
  numerous 
  and 
  even 
  appear 
  to 
  predominate, 
  anterior 
  

   border 
  of 
  dorsum 
  with 
  commencements 
  of 
  two 
  light 
  greyish 
  olive, 
  pollinose, 
  

   longitudinal 
  stripes 
  ; 
  swelling 
  occupying 
  depression 
  at 
  each 
  end 
  of 
  transverse 
  

   suture 
  agreeing 
  in 
  coloration 
  with 
  remainder 
  of 
  dorsum 
  and 
  similarly 
  clothed 
  with 
  

   hair, 
  but 
  without 
  black 
  hair 
  ; 
  pleurae 
  and 
  pectus 
  clothed 
  with 
  yellowish 
  white 
  or 
  

   whitish 
  hair, 
  the 
  tuft 
  of 
  long 
  hair 
  on 
  hind 
  margin 
  of 
  mesopleura 
  conspicuously 
  

   ochreous 
  at 
  base 
  ; 
  pleurae 
  neutral 
  grey 
  pollinose 
  above, 
  pectus 
  and 
  lower 
  part 
  of 
  

   pleurae 
  deep 
  neutral 
  grey. 
  Abdomen 
  : 
  dorsum 
  of 
  first 
  (visible) 
  segment 
  neutral 
  grey 
  

   pollinose 
  (greyish 
  olive 
  pollinose 
  on 
  each 
  side), 
  clothed 
  in 
  centre 
  and 
  on 
  each 
  side 
  with 
  

   glistening 
  yellowish 
  white 
  hair 
  ; 
  posterior 
  transverse 
  bands 
  of 
  appressed, 
  glistening, 
  

   silvery-white 
  hair, 
  on 
  second 
  to 
  sixth 
  segments 
  inclusive, 
  expanded 
  in 
  middle 
  

   line 
  so 
  as 
  to 
  form 
  anteriorly 
  directed 
  triangles 
  ; 
  silvery- 
  white 
  hair 
  also 
  extending 
  

  

  Fig. 
  18. 
  Tabanus 
  dalei, 
  Austen, 
  wing 
  of 
  <J. 
  X 
  10. 
  

  

  from 
  front 
  to 
  hind 
  margins 
  on 
  lateral 
  borders 
  of 
  segments 
  referred 
  to 
  ; 
  on 
  third, 
  

   fourth 
  and 
  fifth 
  segments 
  commencement 
  of 
  expansion 
  of 
  hind 
  border 
  on 
  each 
  

   side 
  includes 
  a 
  certain 
  amount 
  of 
  appressed, 
  ghstening, 
  ochreous 
  hair 
  ; 
  ground- 
  

   colour 
  of 
  hind 
  margins 
  of 
  first 
  six 
  tergites 
  cinnamon-drab 
  ; 
  dorsum, 
  except 
  as 
  

   already 
  stated, 
  clothed 
  with 
  short, 
  appressed, 
  black 
  hair 
  ; 
  venter 
  deep 
  neutral 
  

   grey 
  pollinose 
  (hind 
  margins 
  of 
  segments 
  as 
  on 
  dorsum), 
  clothed 
  with 
  silvery 
  white 
  

   or 
  appressed 
  silvery 
  white 
  hair, 
  which 
  is 
  more 
  conspicuous 
  on 
  hind 
  borders 
  of 
  

   segments, 
  and 
  in 
  central 
  area 
  of 
  anterior 
  part 
  of 
  second, 
  third 
  and 
  fourth 
  segments 
  

   is 
  largely 
  if 
  not 
  entirely 
  replaced 
  by 
  minute 
  black 
  hairs. 
  Wings 
  : 
  veins 
  dark 
  brown 
  

   or 
  mummy 
  brown, 
  proximal 
  portion 
  of 
  fifth 
  longitudinal 
  vein, 
  forming 
  lower 
  

   boundary 
  of 
  second 
  basal 
  cell, 
  ochraceous-tawny 
  and, 
  like 
  corresponding 
  portion 
  

   of 
  fourth 
  longitudinal 
  vein, 
  narrowly 
  suffused 
  with 
  similar 
  colour 
  ; 
  anterior 
  branch 
  

   of 
  third 
  longitudinal 
  vein 
  without 
  appendix 
  ; 
  stigma 
  ochraceous 
  tawny, 
  indis- 
  

   tinguishable 
  from 
  coloured 
  costal 
  border 
  ; 
  proximal 
  portion 
  of 
  marginal 
  cell 
  with 
  

   a 
  narrow 
  hyaline 
  streak 
  on 
  its 
  anterior 
  border. 
  Squamae 
  ivory 
  yellow, 
  borders 
  

   cream-buff 
  or 
  cream-coloured. 
  Halteres 
  : 
  knobs 
  clove 
  brown, 
  stalks 
  mummy 
  

   brown. 
  Legs 
  : 
  coxae 
  neutral 
  grey 
  pollinose, 
  clothed 
  with 
  yellowish 
  white 
  hair 
  ; 
  

   middle 
  and 
  hind 
  femora 
  and 
  posterior 
  surface 
  of 
  front 
  femora 
  clothed 
  with 
  

  

  